The cafeteria needs to provide seating for 189 students. They can fit up to 15 rows of tables in the cafeteria. Each row can contain at most 9 tables but could contain less than that. The tables on each row must be pushed together. Students will still be seated around the tables as described earlier. If they they use exactly 9 tables pushed together to make each row, how many rows will they need to seat 189 students, and how many tables will they need to make those rows?
